Conversion products of azo dyestuffs containing heavy metal bound in complex linkage



United States Patent CONVERSION PRODUCTS 0F AZO DYESTUFFS CONTAINING HEAVY METAL BOUND IN COM- PLEX LINKAGE Werner Kuster, Basel, Switzerland, assignor to J. R. Geigy A.-G., Basel, Switzerland N0 Drawing. Filed June 2, 1959, Ser. No. 817,482 Claims priority, application Switzerland June 12, 1958 7 Claims. (Cl. 260--147) The present invention concerns conversion products of azo dyestuffs containing heavy metal bound in complex linkage and the production thereof, as well as their use for the fast dyeing of cellulose acetate in the mass and of lacquers, and, finally, the material dyed with the aid of these dyestuffs.

It has been found that valuable, new, acetone-soluble conversion products of metallised azo dyestuffs are obtained if complex compounds of azo dyestuffs containing co-ordinatively bound hexavalent heavy metal, which dyestuffs contain no sulphonic acid groups and correspond to the general Formula I ii-N=N1iao 0 OH (I) are reacted with organic nitrogen bases consisting of at least up to 70 mol percent of bases not having dyestuff character and, possibly, of up to 30 mol percent of bases having dyestufi character.

In this formula, X and X are metallisable groups in the neighboring position to the azo group, of which one X must be a hydroxyl group. A represents a radical of the benzene, naphthalene, pyrazolone or acylacetylarylamide series and B represents a radical of the benzene or naphthalene series. The carboxyl group in Formula I is in the neighbouring position to X in azo dyestuffs, for example, halogens, in particular chlorine and bromine, also nitro, cyano, alkyl, ether, alkyl sulphonyl, sulphonic acid amide groups as well as acylamlno groups.

Dyestuffs according to the invention which contain a sulphonyl substituent which does not dissociate acid are particularly valuable. Such sulphonyl substituents are, for example, the lower aliphatic, cycloaliphatic, araliphatic or aromatic sulphonyl groups, for example, methyl, ethyl, butyl, cyclohexyl, benzyl, phenyl, p-toluyl, xylyl sulphonoyl groups; sulphonic acid amide groups which can possibly be substituted at the N atom by aliphatic, cycloaliphatic, araliphatic or aromatic groups, for example, N-methyl, N-ethyl, N.N-dimethyl, N.N-diethyl, N.N- dibutyl, N-cyclohexyl, N.N-dicyclohexyl, N-benzyl, N- phenyl, N-phenyl-N-ethyl, N-phenyl-N-benzyl sulphonic acid amide groups; or sulphonic acid amide groups in which the amide nitrogen atom is a member of a saturated or unsaturated cyclic amine, such as e.g. in the sulphonic acid piperidide or morpholide group.

The metallisable groups X and X are principally represented by the hydroxyl group; however, one X can also be the carboxyl group or an amino group.

When, in the metal-containing dyestuffs corresponding to the general Formula I used according to the invention, B is the radical of a coupling component, for example a 2-hydroxynaphthalene-3-carboxylic acid or a Z-aminonaphthalene-S-carboxylic acid is used as such, thenA is the radical of any unsulphonated o-hydroxyor o-carboxyaryl diazo compound desired. A 2-hydroxy-1-diazobenzene can be used for example as diazo component, which diazobenzene compound may contain the substituents usual in azo dyestuffs which do not dissociate acid in Water, for example, halogen, alkyl, alkoxy, nitro, acylamino, alkyl sulphonyl, aryl sulphonyl, sulphonic acid amide groups and sulphonic acid amide groups which can be organically substituted at the nitrogen atom. Thev following diazo components can be used for example for the production of metal-containing dyestuffs according to the invention: 4-chloro-2-amino-l-hydroxybenzene, 4- methyl-sulphonyl-Z-amino-l-hydroxybenzene, 5- or 6-mitro 4 methyl sulphonyl-Z-amino-l-hydroxybenzene, 2- amino-1-hydroxybenzene-4 or -5-sulphamide, 2-amino-1- hydroxybenzene-4- or -5-sulphomethylamide and 6-nitro- Z-amino-l-hydroxybenzene-4-sulphamide.

If B is the radical of a diazo component, then in the production of metal-containing dyestuffs used accordingto the invention, as diazo component a 3-amino-2-hydroxybenzene-l-carboxylic acid for example can be used which can be substituted in the 5-position, for example, by halogen, alkyl, acylamino groups or by sulphonic acid amide groups which can be organically substituted at the nitrogen atom, also by alkyl or aryl sulphonyl groups. In this case, all unsulphonated compounds coupling in the neighbouring position to a metallisable group can be used as coupling components, e.g. S-pyrazolones, acylacetyl anilides or hydroxynapththalenes or aminonanaphthalenes coupling in a neighbouring position to the hydroxyl or amino group. The dyestuffs are metallised by the usual methods by treatment with agents giving off metal, the metallising process being performed in water or aqueous organic solution or suspension in the heat.

' 2:1 complexes are preferred. Advantageously the simple or complex salts of chromium or cobalt are used as agents giving off metal.

The new acetone-soluble complex salts are precipitated from the aqueous solutions of the metallised azo dyestuffs with organic amines. Organic amines without dyestuff character used for the precipitation are, chiefly, hye, droaromatic amines, in particular.aminoalkyl-polyalkyb' toluidine, aniline or diphenyl guanidine can be used.

It has also been found that these organic amines without dyestulf character can be replaced by up to 30 mol percent of basic dyestuffs whereupon the good solubility in acetone of the end products is retained. The use of basic dyestulfs enables shades of greater strength and brilliance to be attained. Carbonium dyestuffs are used in particular as basic dyestuffs. Of these can be named, in particular, diphenyl methane dyestuffs of the auramine series such as Auramine O (G. Schultz, Dyestulf Tables, 7th edition, No. 752) and Auramine G (No. 753); triphenyl methane dyestuffs of the malachite green series such as malachite Green (No. 754), Brilliant Green (No. 760), Setocyanine O (No. 762) and Setoglaucine O No. 755) and basic dyestuffs of the magenta series such as Victoria Blue B (No. 822); and, chiefly, xanthene dyestuffs of the rhodamine series such as Rhodamine B (No. 864), Rhodamine G (No. 865) and Rhodamine 6G (No. 866). Also dyestuffs containing cyclammonium groups, for example red basic dyestuffs such as are obtained by alkylating p-aminoazo dyestuffs containing a triazole ring, or, also blue basic dyestuffs such as are obtained by alkylating p-aminoazo dyestuffs containing a benzthiazole ring can be mentioned.

More specifically, the application concerns reaction products of one mol of a metalliferous monoazo dyestulf containing a metal selected from the group consisting of chromium and cobalt bound in complex union with'a monoazo dyestuff free from sulphonic acid groups of the general formula Patented Apr. 17,1962 7 wherein:

A represents a member selected from the group consisting of aromatic radicals of the benzene, naphthalene, pyrazolone and acylacetyl arylamide series;

B represents a member selected from the group consisting of the benzene and naphthalene series, wherein the carboxyl group is bound in neighbouring position to 2! of X and X one represents the hydroxy group bound in o-position to the azo group and the other represents a member selected from the group consisting of hydroxy and amino groups bound in o-position to the azo group;

with organic nitrogen bases consisting of 70-100 mol percent of a colourless organic amine and 30-0 mol percent of a basic dyestuff.

Hydroaromatic amines and aliphatic amines and, in particular, dehydroabietylamine are preferred colourless organic amines. Carbonium dyestuffs and, of these, again, the xanthene dyestuffs are preferred basic dyestuffs.

In addition, cobalt complexes of monoazo dyestuffs which, as already mentioned, contain a functionally converted sulphonic acid group such as sulphonic acid amide and alkyl sulphonyl groups, produce particularly valuable conversion products.

Because of their good solubility in acetone, the new conversion products of azo dyestuffs containing heavy metal bound in complex linkage are very suitable for the dyeing of cellulose acetate in the mass as well as for the dyeing of lacquers. Acetate silk dyed in the mass is distinguished by good wet fastness properties such as e.g. fastness to washing, water, sea Water, perspiration, by good fastness to rubbing, dry cleaning and ironing and very good fastness to light.

The following examples illustrate the invention. Parts are given as parts by weight and the temperatures are in degrees Centigrade. The relationship of parts by weight to parts by volume is as that of kilogrammes to litres.

EXAMPLE 1 3.8 .6 parts of monoazo dyestuft from diazotised; Z-aminophenol-4-methyl sulphone and 2.3-hydroxynaphthoic. acid and 6 parts of tartaric acid: are dissolved in 300 parts of water at 80 with the addition of sodium carbonate so that the, reaction is neutral. After adding 100 parts of an aqueous solution of cobalt acetate, containing 3.5% of cobalt, the mixture is refluxed for 6 hours. Thev solution of the cobalt-containing dyestufi is clarified by filtration and a weakly formic acid aqueous solution of 15 parts of Rosinamine D (dehydroabietylamine) is added to the filtrate, at 70. The dyestuif which precipitates is' filtered off, thoroughly washed with hot Water and dried.

The dry dyestufi, is a dark red powder which dissolves well in many organic solvents, in particular in acetone.

It can thus be used for the dyeing of various lacquers,

e.g. of nitro lacquers or annealing lacquers as well as for the dyeing of acetate silk in the cass. The Bordeaux red dyeings of acetate silk dyed in the spinning mass are distinguished by good wet fastness properties and excellent fastness to light.

Very similar products areobtained if in the above example the diazotised 2-aminophenol-4-methyl sulphone is replaced by the corresponding amount of diazotised Z-aminophenol-S-ethyl sulphone, 2-aminophenyl-4-sulphamide or -4-sulphomethylamide, or 3.-amino-4-hydroxydiphenyl sulphone-3'-sulphamide. Similar dyestuffs are also obtained, if equivalent amounts of octylamine, dodecylamine, dicyclohexylamine or amine ODT (lauryl-aminoethyl. ethylene diamine) are used as basic precipitating agent.

EXAMPLE 2 The cobalt containing monoazo dyestuf'r from diazotised '2-aminophenol-4-methyl sulphone and 2.3-hydroxynaphthoic acid is first partially precipitated from the aqueous solution described in Example 1 by the addition at 70 of an aqueous solution of 5 parts of Rhodamine B (tetra-ethyldiamino-o-carboxyphenyl-xanthylium chloride) in 100 parts of water and completely precipitated by the addition of a formic acid solution of 11.5 parts of Rosinamine D in 100 parts of water. The precipitated dyestutf is filtered off, washed with a great deal of water and dried whereupon a vivid red powder is obtained. In organic solvents such as e.g. acetone, it is soluble and can be used for the dyeing of lacquers, e.g. nitro lacquer. The good and complete solubility of the product in acetone enables it to be used for the dyeing of acetate silk in the mass. Acetate silk dyed in the spinning mass therewith has a vivid bluish red shade and is distinguished by good wet fastness properties and excellent fastness to light.

Very similar products are obtained if in the above example, the Rhodamine B is replaced by equivalent amounts of Rhodamine G (triethyldiamino o-carboxyphenyl xanthylium chloride ethyl ester), Rhodamine 6G (symmetrical diethyldiamino-o-carboxyphenyl xanthylium chloride ethyl ester), Auramine G (symmetrical dimethyl-di-pamino-di-o.o-methylbenzophenonirnine hydrochloride) or of the red basic dyestufi such as is obtained by alkylation of a p-aminoazo dyestufit' containing a triazole ring. Rosinamine D can also be replaced by equimolecular amounts of dicyclohexylamin'e or diphenyl guanidine.

EXAMPLE 3 43.1 parts of the monoazo dyestufi from diazotised 5- nitro-2-aminophenol-4-methyl sulphone and 2.3-hydroxynaphthoic acid are dissolved in 500 parts of water with the addition of 10 parts of sodium carbonate. The solution obtained and 100 parts of a solution of the ammonium salt of disalicylato chromic acid, containing 2.7% chromium, are refluxed for 6 hours. chromium-containing dyestufi is mixed at 70 with a solution of 4.5 parts of Setoglaucine O (symmetrical tetramethyl-p-amino-o-chloro-fuchsone imonium chloride) in 100 parts of water and' a solution of 11.5 parts of Rosinamine D and 5 parts of formic acid 85% in 200 parts of water. The dyestuif which precipitates is filtered 01f, washed with a great deal of water and dried.

The dry product is a black powder. It is insoluble in water but dissolves easily in many organic solvents. It can be used for the dyeing of lacquers, e.g. of nitro and annealing lacquers. Because it has perfect solubility in acetone, this dye salt is suitable for the dyeing of acetate silk in the mass. Acetate silk dyed in the spinning mass has a blue colour and good fastness to wet and light.

Dyestufis having very similar properties arev obtained if in the above example, a corresponding amount of a dyestufi produced from diazotised S-nitro-2-aminophenol, 6'-nitro-2-aminophenol-4-ethyl sulphone, 6-nitro-2-aminophenol-4-sulphamide or from a mixture of these com pounds is used for the chroming. The same results are obtained if Setoglaucin O is replaced by equivalent amounts of Setocyanine O (symmetrical diethyl-p-aminom.m'-dimethyl-o-chloro-fuchsone imonium chloride), Victoria Blue B (tetramethylphenyl-p.p-diaminodiphenonaphtho-fuchsone imonium chloride) or of a blue basic dyestuif obtained by alkylation of a p-aminoazo dyestufif containing a benzthiazole ring. Also the Rosinamine D can be, replaced by dodecylamine or. dicyclohexylamine.

EXAMPLE 4 43 parts of the monoazo dyestufl from diazotised 6-nitro-2-aminophenol-4-methyl sulphone and 2,3-aminonaph-- thoic acid and7 parts of tartaricacid are pasted. at

in 700 parts of water and dissolved. with 25 parts of.

The solution of the acid solution of 16 parts of Rosinamine D in 200 parts of water is stirred in whereupon the dyestutf precipitates. It is filtered ofi, washed with water and dried.

The dry dye salt is a dark green powder. It is in- 6 containing a benzthiazole ring, if the precipitation is performed according to the process described in Example 2. The dyestufis so obtained dissolve very well in acetone and can be used for the dyeing of lacquers and of acetylsoluble in hot water but easily soluble in organic solvents, 5 cellulose in the mass. e.g. in ethyl alcohol or acetone. It can be used for dyeing lacquers, e.g. nitro and annealing lacquers and for EXAMPLE 5 the dyeing of acetyl cellulose in the mass. Acetyl cel- 43.1 parts of the monoazo dyestuff from diazotised 2- lulose dyed in the spinning mass has a vivid green shade amino-4-methy1 phenol-fi-carboxylic acid and l-phenyland good wet fastness and excellent fastness to light. 3-methyl-5-pyrazolone-3'-sulphamide are dissolved in 400 Dyestuffs having very similar properties are obtained if parts of water with the addition of parts of ammonoazo dyestuffs are used, the diazo component of monia. 100 parts of an aqueous solution of the amwhich is produced from 6-nitro-2-aminophenol-4-sulphamonium salt of disalicylato chromic acid is added, conanide, 5-nitro-2-aminophenol-4-ethy1 sulphone. Also dyetaining 3.2% chromium, and the whole is refluxed for 6 stuffs which dissolve well in acetone are obtained if in 15 o rsthe above example, the Rosinamine D is completely or The solution of the chromium-containing dyestufi is partly replaced by isoamylamine, tert. octylamine dodecooled to and mixed with a solution of 17.1 parts cylamine or dicyclohexylamine. of Rosinamine D and 7 parts of formic acid in Products having greater colour strength and more bril- 200 parts of water, whereupon the dyestuff precipitates. liant shade are obtained if, in the above example, 20-30 20 After Stirring for 1 hour at the dyestuff is filtered mol percent of the colourless basic precipitating agent is the rfisidue is Washed With Water and driedreplaced by basic dyestuffs such as Setocyanine O (sym- The dry product is a red powder. It is insoluble in hot metrical diethyl-p-amino-m.m'-dimethylo-chloro-fuchwater but dissolves well in many organic solvents such sone imonium chloride), Setoglaucine O (symmetrical as e.g. acetone. It is suitable for the dyeing of lacquers, tetramethyl-p-arnino-o-chloro-fuchsone imonium chlo- 25 for example of nitro lacquer and for the dyeing of aceride), Malachite Green (symmetrical tetramethyl-plate ilk in th massamino-fuchsone imonium chloride), Brilliant Green (syrn- The acetate silk dyed red in the spinning mass has very metrical tetra-ethyl-p-amino-fuchsone imonium sulphate) good fastness to wet and light. or Victoria Blue (tetramethyl-phcnyl-p.p-diaminodi- A P s which are Soluble in a t n are obphenonaphtho-fuchsone imonium chloride). Instead of 30 m if the metal-Containing dyestufis given ill Columns these basic dyestuffs, also the blue dyestufls can be used I and II of the following table are reactedin the manner which are obtained by alkylation of p-aminoazo dyestuffs described above with the bases mentioned in column 111.

Table 1 II III IV No. shadein Monoazo metal base a t p cellulose I CH3 1 HOOC -N=N-(?-(I3 00..-. dieyclohexylamme yellow,-

HO-(J /I I i on:

SOrNHg 2 "do CL.-- NH-CHz-CHz-NHr orange.

(1H1 ([3112 NH-(CHnM-CHa (amine ODT) OH OH 3 HOOOUN: 00.--- RosinamlneD bordea-ux.

-S0NH:

4 .do Cr--- dlcyclohexylamlne 101et.

COCH;

5 H000 N=NC 00--.. RoslnamineD yellow.

OO-I IH SO2CHa T able-Continued I II III IV No. shade in Monoazo metal base acetylcellulose l 6 1100 C N=N(IT-(l% Cr--.. do orange.

HOC\ /N N am 7 d Dodecylamine yellow.

OH OH 8 HO 0 GUN: 00--.- dicyclohexylamine violet.

9;. HO O O N=NOOCHa CL--. do orange.

HO-C N I N No:

S OrNHg O O GHa 10 HOOC N=NCH Co do--- yellow.

0 O-JYIH SOzNE OH:

I C 0 CH3 11 HO O C =N-OH 00---- Rosinamine D Do.

S 0: CH3

EXAMPLE 6 product can be used for the dyeing of lacquers and of acetyl cellulose in the spinning mass. Acetate silk is dyed in the spinning mass a vivid red colour and the dyeings have very good fastness to Wet and light.

Products having similar solubility and more brilliant shades are obtained if 20 to 30 mol percent of the nitrogen base given in column III of the table in Example 5 are replaced by a basic dyestuff of suitable shade, for example by Auramine O (tetrarnethyldiamino-benzophenone imine hydrochloride), Rhodamine G (triethyldiamino-o-carboxyphenyl xanthylium chloride), Rhodamine 6G (symmetrical diethyldiamino-o-carboxyphenyl xanthylium chloride ethyl ester), Rhodamine B (tetracause of its good solubility in many organic solvents, this ethyldiamino-ocarboxyphenyl xanthylium chloride), red

9 alkylation products of triazolyl-p-aminophenylazo dyestuffs and blue alkylation products of benzthiazolylaminophenylazo dyestuffs.

EXAMPLE 7 2.6 parts of acetone soluble dyestuff according to EX- ample 4 are sprinkled into 1000 parts of a solution of acetyl cellulose in acetone which has a solid content of 26%. 20 parts by volume of acetone are added and the mixture is rolled in a well closed flask until the dyestufl' has completely dissolved. The dyed spinning solution is then forced through dies. The thread formed is passed through a long heated tube and then wound onto spools. The vivid green coloured cellulose acetate threads so obtained have excellent fastness to wet and light.

What I claim is:

1. The reaction product of one mol of a metallised monoazo dyestuff containing a metal selected from the group consisting of chromium and cobalt bound in complex union, which monoazo dyestufl. is free from sulphonic acid groups and is selected from the group consisting of compounds of the formulae i HO O C N=NCC ll HOC\ SOgNHg and OH Y CO OH wherein X is a member selected from the group consisting of H and N and Y is a member selected from the group consisting of OH and NH with an organic nitrogen base consisting of 70-100 mol percent of colourless organic amine selected from the group consisting of hydroaromatic amines and aliphatic amines and 30-0 mol percent of carbonium dyestulf.

2. The reaction product as claimed in claim 1, wherein the metal is cobalt, the amine is dehydroabietylamine and the dyestufi is xanthene dyestufl.

3. The reaction product of one mol of a cobaltiferous dyestulf containing cobalt bound in complex union, said monoazo dyestuif being of the formula OH HO OOOH on rnN c0011 ONO =N SOzCHl SO2-C a 6. The compound of the formula CE; I? SO2CHS CHCHz-OHz-NH:] N oh,

0 NH 00011 U 5 S ra .J

7. The compound of the formula HaC-CI IT H000 N=NC N 0 A) OzNH:

I SOzNH, HOOC N=N(I3 III H.C-C=N References Cited in the file of this patent UNITED STATES PATENTS 1,994,709 Holzach et a1. Mar. 19, 1935 2,104,357 Straub et a1. Ian. 4, 1938 2,315,870 Nadler et al. Apr. 6, 1943 2,814,614 Zickendraht Nov. 26, 1957 2,826,573 Strobel et a1. Mar. 11, 1958 OTHER REFERENCES Ser. No. 394,839, Mueller (A.P.C.), published Apr. 20, 1943, abandoned.

Hercules Powder Company Bulletin: Rosin Amine D and its Derivatives, copyright 1956. (Available in Div. 38.) 

1. THE REACTION PRODUCT OF ONE MOL OF A METALLISED MONOAZO DYESTUFF CONTAINING A METAL SELECTED FROM THE GROUP CONSISTING OF CHROMIUM AND COBLAT BOUND IN COMPLEX UNION, WHICH MONOAZO DYESTUFF IS FREE FROM SULPHONIC ACID GROUPS AND IS SELECTED FROM THE GROUP CONSISTING OF COMPOUNDS OF THE FORMULAE 